/* * asn_null.c - BER encode, decode, print and free routines for the * ASN.1 NULL type. * * MS 92 * Copyright (C) 1992 Michael Sample and the University of British Columbia * * This library is free software; you can redistribute it and/or * modify it provided that this copyright/license information is retained * in original form. * * If you modify this file, you must clearly indicate your changes. * * This source code is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * */ #if HAVE_CONFIG_H #include #endif #include "asn_config.h" #include "asn_len.h" #include "asn_tag.h" #include "asn_null.h" /* * encodes universal TAG LENGTH and Contents of and ASN.1 NULL */ AsnLen BEncAsnNull PARAMS((b, data), BUF_TYPE b _AND_ AsnNull* data) { AsnLen len; len = BEncAsnNullContent(b, data); len += BEncDefLen(b, len); len += BEncTag1(b, UNIV, PRIM, NULLTYPE_TAG_CODE); return(len); } /* BEncAsnNull */ /* * decodes universal TAG LENGTH and Contents of and ASN.1 NULL */ void BDecAsnNull PARAMS((b, result, bytesDecoded, env), BUF_TYPE b _AND_ AsnNull* result _AND_ AsnLen* bytesDecoded _AND_ jmp_buf env) { AsnTag tag; AsnLen elmtLen; if ( (tag =BDecTag(b, bytesDecoded, env)) != MAKE_TAG_ID(UNIV, PRIM, NULLTYPE_TAG_CODE)) { Asn1Error("BDecAsnNull: ERROR wrong tag on NULL.\n"); longjmp(env, -40); } elmtLen = BDecLen (b, bytesDecoded, env); BDecAsnNullContent( b, tag, elmtLen, result, bytesDecoded, env); } /* BDecAsnNull */ void BDecAsnNullContent PARAMS((b, tagId, len, result, bytesDecoded, env), BUF_TYPE b _AND_ AsnTag tagId _AND_ AsnLen len _AND_ AsnNull* result _AND_ AsnLen* bytesDecoded _AND_ jmp_buf env) { if ( len != 0) { Asn1Error("BDecAsnNullContent: ERROR - NULL type's len must be 0\n"); longjmp(env, -17); } } /* BDecAsnNullContent */ /* * Prints the NULL value to the given FILE* in Value Notation. * ignores the indent. */ void PrintAsnNull PARAMS((f,v, indent), FILE* f _AND_ AsnNull* v _AND_ unsigned short int indent) { fprintf(f,"NULL"); }
